#define  _CRT_SECURE_NO_WARNINGS 1
#include <stdio.h>
#include <string.h>
//int main()
//{
//	char str[] = "hello world";
//	memset(str, 'x', 6);
//	printf(str);
//	return 0;
//}

//int main()
//{
//	int i = 1;
//	return 0;
//}

//#include <stdio.h>
int main()
{
	char a = -1;
	signed char b = -1;
	unsigned char c = -1;
	printf("a=%d,b=%d,c=%d", a, b, c);
	return 0;
}